Wall board



apt 16 1924. 1508,65

W. M. JENKINS WALL BOARD Filed Jan. 1'? 1924 35 wall 45 set-regulatin Patented Sept 16, 1924.

UNITED- s'rA'rss PATENT OFFICE.

' WILLIAM If. JENKINS, or-cnrcneo, rumors. wa'm. BOARD.

Application filed January 17, 1924. .Serlal no. ceases.

I To all whom it may concern.'"

Be it known that I, WILLIAM M. JENKINS,

. a citizen of. the United States, residin at;

" Chicago, in the county of Cook and of Illinois, have invented certain new and useful Improvements in lVall Board, of

which the following is a specification.

This invention pertains in general to wall boards adapted for use in building construe 1 lt-ions, the present invention being of the general character of and an improvement upon the wall boards disclosed in my rior applications, Serial No. 488,749,'filed October 1, 1921, and No. 588,462, filed September 15 1922, respectively. One of theprimary purposes of this'invention is to provide a com-- position wall board having novel and improved reenforced edges which will permit the driving of nails therethrough without chipping or breaking the board and which will protect the edges of the board sothat they will not become chippedyor cracked in handling and transporting. f I Another object of the invention is to strengthen the general structure of the board by providing a break joint connection between the composition body and the mar i ginal' reinforcing member or members so that any tendency to break or fracture along the juncture line between the composition body I and the-marginal reenforcing member is ob- .viated. Referring now to the drawingsi Fig). 1 is a transverse sectional view of a card embodying my invention;

Figs. 2 to 4, inclusive, are similar fragmentary views of modified forms of the invention. Y Referring now to the drawings more in -4 detail, reference character 5 indicates the =3 body of my improved board which is formed 11g. of suitable composition usually com rising as its principal ingredient psum w ich is mixed with fibrous. materia and water and material to form a plastic masscommon y'termed stucco.

In the form "of the invention shown in Fig. 1, the edges of this composition body are reenforced by members or elements embracing the margins of the body and forming beyond the edges of the body properlv reenforced laminated ed through whic nails maybe driven wit out splitting the same and which serve as a protection to the edges of the body to prevent cracking arid "chipping of the same during the handling of the board.

The reenforciiig member illustrated in Fig. 1 isformed from a single sheet of suitab e material such, for instance, as hea paper or other fibrous material which -13 preferably scored at the roper laces to acilitate its being bent an folds into the desired shape. Asillustrated in Fi 1 the sheet of reenforcing fibrous materia is firstfolded upon itself at thejoint. 6 remote from its edge so as to reach the projecting member 7, forming one element of one of the reenforcing 1e s, and is then folded, back and forth to orm the intermediate accordion plaited portion-8 providing'a laminated margin for the board. The material is then extended inwardly for some "distance beyond the inner end of the element 7 and then folded back upon itself to form the leg 9. The material is then folded up over the outer edge of the laminated portion as. indicated at 11 and 'th 11 inwardlypver the element 7 to complete hie'leg 12.

' Suitable adhesive in icated' generally by q reference character 10 is inter osed between the various folds of the mem er and while im ortance for the reason that this vanation in ength of the legs affords a break joint connection between the com osition body and the reenforcin element w ich obvlates any dan er of the reaking of the board along the ine of juncture between the compositlon and the-reenforcing element. The body and the reenforcing element bein umted as de'- scribed, the board is finishe by ap lym covering sheets 13 and 14 prefers. 1y 0 paper to the upper and ower faces re-v spectii ely of the board.

In the form of the invention illustrated a in Fig. 2 the strip of reenforcin -ma'terial 15 is folded up n itself to form e legs 16 and 17 and also the intermediate folds l8 stead of double ply. In this instance the outer edges of the accordion plaited portion ofvthe reenforcement are not enclosed and therefore serve to define the edge of the board. This form of the invention is ob-' viously more economical to manufacture than the heavier and stronger form illustrated in Fig. 1.

In the form of the invention illustrated in Fig. 4 the reenforcing material is folded uponitself to form the leg 23, and is then carried downwardly to provide the edge defining portion2i, then inwardly and back upon itself to form leg 25, and is then accordion plaitedto form the laminated intermediate portion 26. In this instance, similarly to the form shown in Fig. 2, the composition of the body. itself extends throughout the thickness of the board outwardly to the edge. defining portion 24 of the reenforcement.

From the foregoing it will be manifest that I have provided a wall board having a laminated and reenforced margin which protects the edge of the board against chipping and breaking and also serves as a nail- 1ng strip through which nails may be driven without inju to the board. Furthermore,

the laminate margin is not only securely -united to the composition of the body by a dovetail joint, but this joint, because of the variation in length between the two legs embracing the opposite edges of the board 7 body, is of break joint constructon which obviates any danger of fracture or cleavage tion body and the marginal reenforcing element. and described may obviously be varied within considerable limits within the scope of the invention as defined in the following claims.

I claim:

The structural details illustrated along the juncture line between the composi- 1. A wall board comprising a composi- I a reenforcement including spaced legs straddling the edge of said body, one of said legs being longer than the other to rovide a break joint connection with said ody.

4. A wall board comprisng a composition body provided along an edge with a reenforcing element shaped to provide a laminated intermediate portion, and spaced leg portions embracing the opposite sides of said body. I

'5. A wall board comprising a composition body provided with a reenforcing element at one edge thereof, formed from a s' le piece of material'folded so as to provide a channel shaped member comprising a pair of spaced legs, and an intermediate accordion plaited portion.

6. A wall board comprising a composition body provided with a marginal reenforcement formed from a single piece of reenforcing material folded to provide an intermediate accordion plaited portion and inwardly projectin legs embracing oppositefaces of said b0 y, and covering material disposed over the faces of said board.

WILLIAM M. 

